So, page 18 of the Ohr testimony says that Coheh, Manafort and others who Ohr refused to name were cooperating with Fusion GPS and the FBI during the campaign..

Ohr also mentions Sergei Millian as a major source to Steele.

https://dougcollins.house.gov/sites/dougcollins.house.gov/files/Ohr%20Interview%20Transcript%208.28.18.pdf?utm_source=Collins+Judiciary+Press+List&utm_campaign=9b7433685d-EMAIL_CAMPAIGN_2019_03_07_11_37&utm_medium=email&utm_term=0_ff92df788e-9b7433685d-168921541